“This whole (childhood) obesity epidemic can be obliterated by the sneaky fitness method,” she added.

Her book contains over 100 toddler-to-tween-targeted strategies, games and tips for exercising children. Sneaky Fitness is the fourth book in a series that sets forth what Lapine labels the sneaky lifestyle.

The best-selling Sneaky Chef cookbooks aimed to sneak good food into kids diets with recipes such as spinach-laced brownies and cookies with wheat germ folded in.

“Eating healthy is only half the battle. You really have to move more. Our kids today are really living a very sedentary lifestyle,” she said.

According to data from the US Centers for Disease Control and Prevention (CDC), some 17 per cent of children are obese, three times as many as 30 years ago.

“When we were growing up we could go out and play tag or climb a tree unsupervised,” Lapine said. “Today everything has to be planned. These days play happens in the den.”

Lapine, who has a degree in psychology, said motivating kids is an important part of the sneaky philosophy.

In other words, its fun.

An activity dubbed Slip and Slide has kids sliding across the floor.

“You just say, Go make your socks as dirty as possible and put on some fun music, like the twist,” she said. “Now theyve skated and twisted all over the floor, theyve helped mommy clean up, and they burned three times the calories as they would watching TV.”

Sneaky strategies include planting a mini trampoline or hula hoop in the TV room.

“They naturally gravitate to these items,” Lapine explained. “All of a sudden they’re watching Hannah Montana or American Idol and they cant sit still.”

Or, if they must play that computer game, Lapine says, have them do it while sitting on a stability ball.

Jessica Matthews, spokesperson for the American Council of Exercise, likes the sneaky philosophy.

“Adults hop on a treadmill for 40 or 60 minutes, but for a child that’s not enjoyable,” said Matthews, a former K-12 physical education teacher. “But fold in exercise with fun activities and games throughout the day and children will respond.”

Shes particularly fond of the sneaky strategy of leaving a stopwatch around.

“Give a child a stopwatch and Boy! Youd be surprised how fast they can move.”

Matthews’ one qualm is that so many of the activities require adult supervision.

“For a lot of them a parent would need to be present,” she said.

But if, despite all this stimulation, your child still resists the sneaky way of life, there remains Fitness Tip 40, which promises to boost cardio-vascular endurance, co-ordination and mood. Best of all, compliance is virtually certain.